[11: https://www.dhs.gov/news/2020/03/11/homeland-security-acting-secretary-chad-f-wolf-s-statement-presidential-proclamation ][12: https://www.dhs.gov/news/2020/03/16/department-homeland-security-outlines-new-process-americans-returning-schengen-area ][13: COM(2020) 115 final of 16 March 2020.
[11: https://www.dhs.gov/news/2020/03/11/homeland-security-acting-secretary-chad-f-wolf-s-statement-presidential-proclamation ][12: https://www.dhs.gov/news/2020/03/16/department-homeland-security-outlines-new-process-americans-returning-schengen-area ][13: COM(2020) 115 final van 16 maart 2020.